2019-05-19 19:08:20 +07:00
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// SPDX-License-Identifier: GPL-2.0-only
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2012-10-09 06:30:39 +07:00
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#include <linux/module.h>
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2017-09-09 06:14:46 +07:00
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#include <linux/moduleparam.h>
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2012-10-09 06:31:33 +07:00
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#include <linux/rbtree_augmented.h>
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2012-10-09 06:30:39 +07:00
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#include <linux/random.h>
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#include <linux/slab.h>
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2012-10-09 06:30:39 +07:00
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#include <asm/timex.h>
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#define __param(type, name, init, msg) \
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static type name = init; \
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module_param(name, type, 0444); \
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MODULE_PARM_DESC(name, msg);
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__param(int, nnodes, 100, "Number of nodes in the rb-tree");
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__param(int, perf_loops, 1000, "Number of iterations modifying the rb-tree");
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__param(int, check_loops, 100, "Number of iterations modifying and verifying the rb-tree");
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2012-10-09 06:30:39 +07:00
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struct test_node {
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u32 key;
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2014-01-24 06:56:05 +07:00
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struct rb_node rb;
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2012-10-09 06:31:15 +07:00
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/* following fields used for testing augmented rbtree functionality */
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u32 val;
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u32 augmented;
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2012-10-09 06:30:39 +07:00
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};
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2017-09-09 06:14:52 +07:00
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static struct rb_root_cached root = RB_ROOT_CACHED;
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static struct test_node *nodes = NULL;
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static struct rnd_state rnd;
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static void insert(struct test_node *node, struct rb_root_cached *root)
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{
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struct rb_node **new = &root->rb_root.rb_node, *parent = NULL;
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u32 key = node->key;
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while (*new) {
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parent = *new;
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if (key < rb_entry(parent, struct test_node, rb)->key)
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new = &parent->rb_left;
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else
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new = &parent->rb_right;
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}
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rb_link_node(&node->rb, parent, new);
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rb_insert_color(&node->rb, &root->rb_root);
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}
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static void insert_cached(struct test_node *node, struct rb_root_cached *root)
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{
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struct rb_node **new = &root->rb_root.rb_node, *parent = NULL;
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u32 key = node->key;
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bool leftmost = true;
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while (*new) {
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parent = *new;
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if (key < rb_entry(parent, struct test_node, rb)->key)
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new = &parent->rb_left;
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else {
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new = &parent->rb_right;
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leftmost = false;
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}
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}
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rb_link_node(&node->rb, parent, new);
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rb_insert_color_cached(&node->rb, root, leftmost);
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}
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static inline void erase(struct test_node *node, struct rb_root_cached *root)
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{
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rb_erase(&node->rb, &root->rb_root);
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}
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static inline void erase_cached(struct test_node *node, struct rb_root_cached *root)
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{
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rb_erase_cached(&node->rb, root);
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}
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2012-10-09 06:31:15 +07:00
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static inline u32 augment_recompute(struct test_node *node)
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{
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u32 max = node->val, child_augmented;
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if (node->rb.rb_left) {
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child_augmented = rb_entry(node->rb.rb_left, struct test_node,
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rb)->augmented;
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if (max < child_augmented)
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max = child_augmented;
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}
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if (node->rb.rb_right) {
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child_augmented = rb_entry(node->rb.rb_right, struct test_node,
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rb)->augmented;
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if (max < child_augmented)
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max = child_augmented;
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}
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return max;
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}
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2012-10-09 06:31:21 +07:00
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RB_DECLARE_CALLBACKS(static, augment_callbacks, struct test_node, rb,
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u32, augmented, augment_recompute)
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static void insert_augmented(struct test_node *node,
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struct rb_root_cached *root)
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{
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struct rb_node **new = &root->rb_root.rb_node, *rb_parent = NULL;
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u32 key = node->key;
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u32 val = node->val;
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struct test_node *parent;
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while (*new) {
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rb_parent = *new;
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parent = rb_entry(rb_parent, struct test_node, rb);
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if (parent->augmented < val)
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parent->augmented = val;
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if (key < parent->key)
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new = &parent->rb.rb_left;
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else
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new = &parent->rb.rb_right;
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}
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2012-10-09 06:31:17 +07:00
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node->augmented = val;
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rb_link_node(&node->rb, rb_parent, new);
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rb_insert_augmented(&node->rb, &root->rb_root, &augment_callbacks);
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}
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static void insert_augmented_cached(struct test_node *node,
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struct rb_root_cached *root)
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{
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struct rb_node **new = &root->rb_root.rb_node, *rb_parent = NULL;
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u32 key = node->key;
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u32 val = node->val;
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struct test_node *parent;
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bool leftmost = true;
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while (*new) {
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rb_parent = *new;
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parent = rb_entry(rb_parent, struct test_node, rb);
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if (parent->augmented < val)
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parent->augmented = val;
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if (key < parent->key)
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new = &parent->rb.rb_left;
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else {
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new = &parent->rb.rb_right;
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leftmost = false;
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}
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}
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node->augmented = val;
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rb_link_node(&node->rb, rb_parent, new);
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rb_insert_augmented_cached(&node->rb, root,
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leftmost, &augment_callbacks);
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}
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static void erase_augmented(struct test_node *node, struct rb_root_cached *root)
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{
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rb_erase_augmented(&node->rb, &root->rb_root, &augment_callbacks);
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2012-10-09 06:31:15 +07:00
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}
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static void erase_augmented_cached(struct test_node *node,
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struct rb_root_cached *root)
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{
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rb_erase_augmented_cached(&node->rb, root, &augment_callbacks);
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}
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2012-10-09 06:30:39 +07:00
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static void init(void)
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{
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int i;
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for (i = 0; i < nnodes; i++) {
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2012-12-18 07:04:23 +07:00
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nodes[i].key = prandom_u32_state(&rnd);
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nodes[i].val = prandom_u32_state(&rnd);
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}
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}
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static bool is_red(struct rb_node *rb)
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{
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return !(rb->__rb_parent_color & 1);
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}
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static int black_path_count(struct rb_node *rb)
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{
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int count;
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for (count = 0; rb; rb = rb_parent(rb))
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count += !is_red(rb);
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return count;
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}
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2014-01-24 06:56:06 +07:00
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static void check_postorder_foreach(int nr_nodes)
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{
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struct test_node *cur, *n;
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int count = 0;
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rbtree_postorder_for_each_entry_safe(cur, n, &root.rb_root, rb)
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count++;
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WARN_ON_ONCE(count != nr_nodes);
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}
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2013-09-12 04:25:17 +07:00
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static void check_postorder(int nr_nodes)
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{
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struct rb_node *rb;
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int count = 0;
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for (rb = rb_first_postorder(&root.rb_root); rb; rb = rb_next_postorder(rb))
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count++;
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WARN_ON_ONCE(count != nr_nodes);
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}
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2012-10-09 06:30:39 +07:00
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static void check(int nr_nodes)
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{
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struct rb_node *rb;
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2013-05-01 05:28:24 +07:00
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int count = 0, blacks = 0;
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u32 prev_key = 0;
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2017-09-09 06:14:52 +07:00
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for (rb = rb_first(&root.rb_root); rb; rb = rb_next(rb)) {
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struct test_node *node = rb_entry(rb, struct test_node, rb);
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WARN_ON_ONCE(node->key < prev_key);
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WARN_ON_ONCE(is_red(rb) &&
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(!rb_parent(rb) || is_red(rb_parent(rb))));
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if (!count)
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blacks = black_path_count(rb);
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else
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WARN_ON_ONCE((!rb->rb_left || !rb->rb_right) &&
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blacks != black_path_count(rb));
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prev_key = node->key;
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count++;
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}
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2013-05-01 05:28:24 +07:00
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2012-10-09 06:30:39 +07:00
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WARN_ON_ONCE(count != nr_nodes);
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WARN_ON_ONCE(count < (1 << black_path_count(rb_last(&root.rb_root))) - 1);
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2013-09-12 04:25:17 +07:00
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check_postorder(nr_nodes);
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2014-01-24 06:56:06 +07:00
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check_postorder_foreach(nr_nodes);
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2012-10-09 06:30:39 +07:00
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}
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2012-10-09 06:31:15 +07:00
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static void check_augmented(int nr_nodes)
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{
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struct rb_node *rb;
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check(nr_nodes);
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for (rb = rb_first(&root.rb_root); rb; rb = rb_next(rb)) {
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struct test_node *node = rb_entry(rb, struct test_node, rb);
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WARN_ON_ONCE(node->augmented != augment_recompute(node));
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}
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}
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2013-05-01 05:28:25 +07:00
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static int __init rbtree_test_init(void)
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{
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int i, j;
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cycles_t time1, time2, time;
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2017-09-09 06:14:49 +07:00
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struct rb_node *node;
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2012-10-09 06:30:39 +07:00
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treewide: kmalloc() -> kmalloc_array()
The kmalloc() function has a 2-factor argument form, kmalloc_array(). This
patch replaces cases of:
kmalloc(a * b, gfp)
with:
kmalloc_array(a * b, gfp)
as well as handling cases of:
kmalloc(a * b * c, gfp)
with:
kmalloc(array3_size(a, b, c), gfp)
as it's slightly less ugly than:
kmalloc_array(array_size(a, b), c, gfp)
This does, however, attempt to ignore constant size factors like:
kmalloc(4 * 1024, gfp)
though any constants defined via macros get caught up in the conversion.
Any factors with a sizeof() of "unsigned char", "char", and "u8" were
dropped, since they're redundant.
The tools/ directory was manually excluded, since it has its own
implementation of kmalloc().
The Coccinelle script used for this was:
// Fix redundant parens around sizeof().
@@
type TYPE;
expression THING, E;
@@
(
kmalloc(
- (sizeof(TYPE)) * E
+ sizeof(TYPE) * E
, ...)
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kmalloc(
- (sizeof(THING)) * E
+ sizeof(THING) * E
, ...)
)
// Drop single-byte sizes and redundant parens.
@@
expression COUNT;
typedef u8;
typedef __u8;
@@
(
kmalloc(
- sizeof(u8) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(__u8) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(char) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(unsigned char) * (COUNT)
+ COUNT
, ...)
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kmalloc(
- sizeof(u8) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(__u8) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(char) * COUNT
+ COUNT
, ...)
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kmalloc(
- sizeof(unsigned char) * COUNT
+ COUNT
, ...)
)
// 2-factor product with sizeof(type/expression) and identifier or constant.
@@
type TYPE;
expression THING;
identifier COUNT_ID;
constant COUNT_CONST;
@@
(
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_ID)
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_ID
+ COUNT_ID, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (COUNT_CONST)
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * COUNT_CONST
+ COUNT_CONST, sizeof(TYPE)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_ID)
+ COUNT_ID, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_ID
+ COUNT_ID, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (COUNT_CONST)
+ COUNT_CONST, sizeof(THING)
, ...)
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- kmalloc
+ kmalloc_array
(
- sizeof(THING) * COUNT_CONST
+ COUNT_CONST, sizeof(THING)
, ...)
)
// 2-factor product, only identifiers.
@@
identifier SIZE, COUNT;
@@
- kmalloc
+ kmalloc_array
(
- SIZE * COUNT
+ COUNT, SIZE
, ...)
// 3-factor product with 1 sizeof(type) or sizeof(expression), with
// redundant parens removed.
@@
expression THING;
identifier STRIDE, COUNT;
type TYPE;
@@
(
kmalloc(
- sizeof(TYPE) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(TYPE) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(TYPE))
, ...)
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kmalloc(
- sizeof(THING) * (COUNT) * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * (COUNT) * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * COUNT * (STRIDE)
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
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kmalloc(
- sizeof(THING) * COUNT * STRIDE
+ array3_size(COUNT, STRIDE, sizeof(THING))
, ...)
)
// 3-factor product with 2 sizeof(variable), with redundant parens removed.
@@
expression THING1, THING2;
identifier COUNT;
type TYPE1, TYPE2;
@@
(
kmalloc(
- sizeof(TYPE1) * sizeof(TYPE2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(TYPE2))
, ...)
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kmalloc(
- sizeof(THING1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(THING1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(THING1), sizeof(THING2))
, ...)
|
kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * COUNT
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
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kmalloc(
- sizeof(TYPE1) * sizeof(THING2) * (COUNT)
+ array3_size(COUNT, sizeof(TYPE1), sizeof(THING2))
, ...)
)
// 3-factor product, only identifiers, with redundant parens removed.
@@
identifier STRIDE, SIZE, COUNT;
@@
(
kmalloc(
- (COUNT) * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- COUNT * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
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kmalloc(
- COUNT * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * STRIDE * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- (COUNT) * (STRIDE) * (SIZE)
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
|
kmalloc(
- COUNT * STRIDE * SIZE
+ array3_size(COUNT, STRIDE, SIZE)
, ...)
)
// Any remaining multi-factor products, first at least 3-factor products,
// when they're not all constants...
@@
expression E1, E2, E3;
constant C1, C2, C3;
@@
(
kmalloc(C1 * C2 * C3, ...)
|
kmalloc(
- (E1) * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * E3
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- (E1) * (E2) * (E3)
+ array3_size(E1, E2, E3)
, ...)
|
kmalloc(
- E1 * E2 * E3
+ array3_size(E1, E2, E3)
, ...)
)
// And then all remaining 2 factors products when they're not all constants,
// keeping sizeof() as the second factor argument.
@@
expression THING, E1, E2;
type TYPE;
constant C1, C2, C3;
@@
(
kmalloc(sizeof(THING) * C2, ...)
|
kmalloc(sizeof(TYPE) * C2, ...)
|
kmalloc(C1 * C2 * C3, ...)
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kmalloc(C1 * C2, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * (E2)
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(TYPE) * E2
+ E2, sizeof(TYPE)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * (E2)
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- sizeof(THING) * E2
+ E2, sizeof(THING)
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * E2
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- (E1) * (E2)
+ E1, E2
, ...)
|
- kmalloc
+ kmalloc_array
(
- E1 * E2
+ E1, E2
, ...)
)
Signed-off-by: Kees Cook <keescook@chromium.org>
2018-06-13 03:55:00 +07:00
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nodes = kmalloc_array(nnodes, sizeof(*nodes), GFP_KERNEL);
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2017-09-09 06:14:46 +07:00
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if (!nodes)
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return -ENOMEM;
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2012-10-09 06:30:39 +07:00
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printk(KERN_ALERT "rbtree testing");
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2012-12-18 07:04:23 +07:00
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prandom_seed_state(&rnd, 3141592653589793238ULL);
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2012-10-09 06:30:39 +07:00
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init();
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time1 = get_cycles();
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2017-09-09 06:14:46 +07:00
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for (i = 0; i < perf_loops; i++) {
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for (j = 0; j < nnodes; j++)
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2012-10-09 06:30:39 +07:00
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insert(nodes + j, &root);
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++)
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2012-10-09 06:30:39 +07:00
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erase(nodes + j, &root);
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}
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time2 = get_cycles();
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time = time2 - time1;
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2017-09-09 06:14:46 +07:00
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time = div_u64(time, perf_loops);
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2017-09-09 06:14:52 +07:00
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printk(" -> test 1 (latency of nnodes insert+delete): %llu cycles\n",
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(unsigned long long)time);
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time1 = get_cycles();
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for (i = 0; i < perf_loops; i++) {
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for (j = 0; j < nnodes; j++)
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insert_cached(nodes + j, &root);
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for (j = 0; j < nnodes; j++)
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erase_cached(nodes + j, &root);
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}
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time2 = get_cycles();
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time = time2 - time1;
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time = div_u64(time, perf_loops);
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printk(" -> test 2 (latency of nnodes cached insert+delete): %llu cycles\n",
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(unsigned long long)time);
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2012-10-09 06:30:39 +07:00
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2017-09-09 06:14:49 +07:00
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for (i = 0; i < nnodes; i++)
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insert(nodes + i, &root);
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time1 = get_cycles();
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for (i = 0; i < perf_loops; i++) {
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2017-09-09 06:14:52 +07:00
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for (node = rb_first(&root.rb_root); node; node = rb_next(node))
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2017-09-09 06:14:49 +07:00
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;
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}
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time2 = get_cycles();
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time = time2 - time1;
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time = div_u64(time, perf_loops);
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2017-09-09 06:14:52 +07:00
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printk(" -> test 3 (latency of inorder traversal): %llu cycles\n",
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(unsigned long long)time);
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time1 = get_cycles();
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for (i = 0; i < perf_loops; i++)
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node = rb_first(&root.rb_root);
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time2 = get_cycles();
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time = time2 - time1;
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time = div_u64(time, perf_loops);
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printk(" -> test 4 (latency to fetch first node)\n");
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printk(" non-cached: %llu cycles\n", (unsigned long long)time);
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time1 = get_cycles();
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for (i = 0; i < perf_loops; i++)
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node = rb_first_cached(&root);
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time2 = get_cycles();
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time = time2 - time1;
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time = div_u64(time, perf_loops);
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printk(" cached: %llu cycles\n", (unsigned long long)time);
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2017-09-09 06:14:49 +07:00
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for (i = 0; i < nnodes; i++)
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erase(nodes + i, &root);
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/* run checks */
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2017-09-09 06:14:46 +07:00
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for (i = 0; i < check_loops; i++) {
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2012-10-09 06:30:39 +07:00
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init();
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++) {
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2012-10-09 06:30:39 +07:00
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check(j);
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insert(nodes + j, &root);
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}
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++) {
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check(nnodes - j);
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2012-10-09 06:30:39 +07:00
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erase(nodes + j, &root);
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}
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check(0);
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}
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2012-10-09 06:31:15 +07:00
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printk(KERN_ALERT "augmented rbtree testing");
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init();
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time1 = get_cycles();
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2017-09-09 06:14:46 +07:00
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for (i = 0; i < perf_loops; i++) {
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for (j = 0; j < nnodes; j++)
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2012-10-09 06:31:15 +07:00
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insert_augmented(nodes + j, &root);
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++)
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2012-10-09 06:31:15 +07:00
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erase_augmented(nodes + j, &root);
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}
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time2 = get_cycles();
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time = time2 - time1;
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2017-09-09 06:14:46 +07:00
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time = div_u64(time, perf_loops);
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2017-09-09 06:14:49 +07:00
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printk(" -> test 1 (latency of nnodes insert+delete): %llu cycles\n", (unsigned long long)time);
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2012-10-09 06:31:15 +07:00
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2017-09-09 06:14:52 +07:00
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time1 = get_cycles();
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for (i = 0; i < perf_loops; i++) {
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for (j = 0; j < nnodes; j++)
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insert_augmented_cached(nodes + j, &root);
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for (j = 0; j < nnodes; j++)
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erase_augmented_cached(nodes + j, &root);
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}
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time2 = get_cycles();
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time = time2 - time1;
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time = div_u64(time, perf_loops);
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printk(" -> test 2 (latency of nnodes cached insert+delete): %llu cycles\n", (unsigned long long)time);
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2017-09-09 06:14:46 +07:00
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for (i = 0; i < check_loops; i++) {
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2012-10-09 06:31:15 +07:00
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init();
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++) {
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2012-10-09 06:31:15 +07:00
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check_augmented(j);
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insert_augmented(nodes + j, &root);
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}
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2017-09-09 06:14:46 +07:00
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for (j = 0; j < nnodes; j++) {
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check_augmented(nnodes - j);
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2012-10-09 06:31:15 +07:00
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erase_augmented(nodes + j, &root);
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}
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check_augmented(0);
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}
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2017-09-09 06:14:46 +07:00
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kfree(nodes);
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2012-10-09 06:30:39 +07:00
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return -EAGAIN; /* Fail will directly unload the module */
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}
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2013-05-01 05:28:25 +07:00
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static void __exit rbtree_test_exit(void)
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2012-10-09 06:30:39 +07:00
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{
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printk(KERN_ALERT "test exit\n");
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}
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module_init(rbtree_test_init)
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module_exit(rbtree_test_exit)
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Michel Lespinasse");
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MODULE_DESCRIPTION("Red Black Tree test");
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